Ducks at a Distance
A Waterfowl Identification Guide

Common Merganser

This species is larger than the red-breasted merganser, and is one of the largest of our ducks. It is one of the last to migrate south, and is more common than the red-breasted merganser on inland waters.

Flocks move in "follow the leader" style, low over the water. The only call seems to be a startled croak.